I stopped doing extract brews and started AG because by the time I'd bought hops, spec malts, good yeast and good malt extracts it was costing a small fortune per batch and still needing a boil after a grain steep.
I had been wondering, so perhaps a good time for a comparison. As i mentioned, i've stocked up with 15kg growlers of LME which cost me $68 from G&G. So a full extract Dr Smurto's Golden Ale costs me:
LME: 1.5kg wheat, 1.5kg light = $13.60
250gm Crystal 120 = $1.45 ($2.90 for 500gm from DHBW, saved half for my upcoming American Amber Ale)
50gm Amarillo hops = $4.25
15gm Warrior hops (if you'd rather use warrior for bittering and save all the Amarillo for late addition) = $3
US-05 yeast = $3.65
All up we're talking around $26 for 21 litres ($1.24 per litre). Given the hops and yeast would be the same cost for AG, lets say $15 for the extract and grain components. Actually I think the AG recipe for DSGA uses 250gm Caramunich I, so that's probably a direct replacement for the Crystal, so let's just say $13.60 for extract and the rest is the same for both AG and Partial boil Extract?
Now i'm guessing at the AG price of DSGA, so please correct me if I get something wrong, but from the looks it uses spot on 4kg of Pilsner, Pale Munich and Munich I. G&G's 2-20kg price for Joe White grain is $3.90 per kg, right? Lets apply the same 20% discount I got on my extract last week. So 4kg of grain = $12.48. Adding the rest of the ingredient prices in, I come to $24.88 for 21 litres ($1.18 per litre). So there's 6 cents per litre difference between them. Not quite a "small fortune per batch" by my calcs?
I think you can save money on grain by buying in bulk, but of course we're not taking into account any equipment needed for milling, mashing, full boil heating, sparging and cooling....I have no idea of the costs, if any, involved in that so any AG brewers not bored shitless yet please feel free to chip in!